Question

is 3.14 irrational

Answer 1

Yes @tomtom777 as it is a terminating decimal and I can write it as : \(\cfrac{314}{100}\) , 314 and 100 belong to integers and 100 is not equal to zero.

Which fulfills the condition of a rational number.

Answer 2

But are you talking about \(\pi\) ?

Answer 3

pi
yes

Answer 4

can -0.321 be integer?

Answer 5

No! @tomtom777 as integers dont' contain decimals. They are whole like 1, -1,2 ..

Answer 6

thank you mathslover :)

Answer 7

\[\huge\frac{ 22 }{ 7 }\] is rational but pi is irrational

Answer 8

Now, pi is irrational because :
\(\pi =\cfrac{ \textbf{circumference of the circle}}{\textbf{ diameter of the circle}}\)

As we know that circumference of a circle can not be measured perfectly, so we have pi as irrational.

Answer 9

You can also prove that pi is irrational by contradiction. But that would be quite hard for you and leanthy also.

Answer 10

http://en.wikipedia.org/wiki/Proof_that_%CF%80_is_irrational

You can see the proves there.